Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Control method and device of water chilling unit and system

A chiller and controller technology, applied in heating and ventilation control systems, heating and ventilation safety systems, heating methods, etc., can solve problems such as lower condenser water temperature, chiller not working normally, low condensation pressure, etc.

Active Publication Date: 2021-05-28
丁一 +1
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the semi-free cooling mode, in order to make the plate heat exchanger contribute more load, it is necessary to reduce the water temperature of the lower tower of the cooling tower, but too low water temperature of the lower tower will not only reduce the load rate of the chiller to the minimum load rate, but also It will reduce the temperature of the water flowing into the condenser of the chiller to its limit value, which will cause the condensing pressure to be too low and prevent the chiller from working properly
[0004] At present, for the control of semi-free cooling conditions, manual debugging is used to ensure the minimum load rate of the chiller. There is no clear quantitative index for control, and the normal operation of the chiller cannot be fully guaranteed.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Control method and device of water chilling unit and system
  • Control method and device of water chilling unit and system
  • Control method and device of water chilling unit and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0050] The terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein, for example, can be practiced in sequences other than those illustrated or described ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a control method and device of a water chilling unit and a system. The control method is applied to a controller of an air conditioning system, the air conditioning system comprises a cooling tower, a plate heat exchanger, the water chilling unit and the controller, and the water chilling unit comprises a condenser and an evaporator. A lower tower header pipe of the cooling tower is connected with the plate heat exchanger, an upper tower header pipe of the cooling tower is connected with the water chilling unit, the plate heat exchanger is connected with the water chilling unit, and the controller is connected with a temperature sensor at an inlet of the condenser, a temperature sensor at an inlet of the evaporator, the cooling tower and the plate heat exchanger. The controller obtains inlet temperature values of the evaporator and the condenser and the flow of the freezing side of the water chilling unit in real time, the inlet temperature of the freezing side of the water chilling unit is adjusted by adjusting an adjusting valve on the cooling side of the plate heat exchanger, and the inlet temperature of the cooling side of the water chilling unit is adjusted by adjusting the rotating speed of a cooling fan of the cooling tower. According to the method, the load rate of the water chilling unit is not lower than the minimum load rate, and it is guaranteed that surge of the water chilling unit is avoided.

Description

technical field [0001] The present application relates to the technical field of air conditioning, and in particular to a control method, device and system of a chiller. Background technique [0002] In occasions where refrigeration is required all year round, for an air conditioning system composed of chillers, plate heat exchangers, cooling towers, water pumps, etc., when the outdoor temperature drops, the plate heat exchangers and cooling towers can be used to partially cool the chilled water in advance. Then let the chilled water enter the chiller, and the chiller will reduce the temperature of the chilled water to the set temperature. This mode of operation is generally referred to as a semi-free cooling mode. [0003] In the semi-free cooling mode, in order to make the plate heat exchanger contribute more load, it is necessary to reduce the water temperature of the lower tower of the cooling tower, but too low water temperature of the lower tower will not only reduce ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/49F24F11/70F24F11/89F24F11/63F24F140/20
CPCF24F11/49F24F11/70F24F11/89F24F11/63F24F2140/20Y02B30/70
Inventor 徐世宇丁一许磊王明理
Owner 丁一
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com